*{
    padding: 0;
    margin:0;
    box-sizing: border-box;
    font-family: 'Poppins',sans-serif;
}

.header {
    height: 50x; /* 根据需要调整高度 */
    background: #f2f2f2; /* 根据需要调整背景颜色 */
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
}
.logo img {
    float: left;
    margin-left: 150px;
    padding-bottom: 20px;
}
.nav {
    float: left;
    margin-right:180px;
}
.nav ul li {
    float: left;
    margin-right: 30px;
    
}
.nav ul li a {
    display: block;
    padding: 10px 12px;
    color: #050505;
    font-size: 18px;
}
.nav ul li a:hover {
    border-bottom: 2px solid #00a4ff;
}
section {
    position: relative;
    min-height: 100vh;
    background: lightblue; 
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    padding-top: 20px;
}

section .container {
    position: relative;
    width: 800px;
    height: 500px;
    background: #fff;
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

section .container .user{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
}

section .container .imgBx{
    position: relative;
    width: 50%;
    height: 100%;
    transition: .5s;
}

section .container .user .imgBx img{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}
section .container .user .formBx {
    position: relative;
    width: 50%;
    height: 100%;
    background: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px;
    transition: .5s;
}
section .container .user .formBx form h2{
    font-size: 18px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-align: center;
    width: 100%;
    margin-bottom: 10px;
    color: #555;
}
section .container .user .formBx form input{
    position: relative;
    width: 100%;
    padding: 10px;
    background: #f5f5f5;
    color: #333;
    border: none;
    outline:none;
    box-shadow:none;
    margin: 8px 0;
    font-size: 14px;
    letter-spacing:1px;
    font-weight: 300;
}
section .container .user .formBx form input[type="submit"]{
    max-width: 100px;
     background: #677eff; 
    color:#fff;
    cursor:pointer;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 1px;
    transition: .5s;
} 
section .container .user .formBx form .signup{
    position: relative;
    margin-top: 20px;
    font-size: 12px;
    letter-spacing: 1px;
    color: #555;
    text-transform: uppercase;
    font-weight: 300;
}
section .container .user .formBx form .signup a{
    font-weight: 600;
    text-decoration: none;
    color: #677eff;
}
section .container .singupBx {
    pointer-events: none;
}
section .container.active .singupBx {
    pointer-events: initial;
}
section .container .singupBx .formBx {
    left: 100%;
}
section .container.active .singupBx .formBx {
    left: 0;
}
section .container .singupBx .imgBx {
    left: -100%;
}
section .container.active .singupBx .imgBx {
    left: 0;
}
section .container .singinBx .formBx {
    left: 0;
}
section .container.active .singinBx .formBx {
    left: 100%;
}
section .container .singinBx .imgBx {
    left: 0;
}
section .container.active .singinBx .imgBx {
    left: 100%;
}
@media (max-width: 991px) {
    section .container {
        max-width: 400px;
    }

    section .container .imgBx {
        display: none;
    }

    section .container .user .formBx {
        width: none;
    }
}
.popup {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #fff;
    padding: 20px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    z-index: 999;
}

.tool {
    position: fixed;
    top: 80px;
    right: 10px;
    width: 50px;
    text-align: center;
    z-index: 10;
  }
  .tool a {
    position: relative;
    display: block;
    font-size: 13px;
    height: 44px;
    line-height: 17px;
    background-color: #fff;
    padding: 8px 8px 0;
    cursor: pointer;
  }
  .tool a::after {
    content: "";
    position: absolute;
    left: 8px;
    bottom: -1px;
    width: 34px;
    border-bottom: 1px solid #efefef;
    z-index: 5;
  }
  .tool a.on,
  .tool a:hover {
    background-color: #e63e3e;
    color: #fff;
    z-index: 6;
  }
  a.tool-item1 {
    color: #e63e3e;
  }
  a.tool-item2 {
    color: #28abff;
  }
  a.tool-item3 {
    color: #ff9f00;
  }
  a.tool-item5 {
    line-height: 40px;
  }
  
  .top-arrow {
    display: block;
    width: 6px;
    height: 6px;
    border-top: 1.5px solid #999;
    border-left: 1.5px solid #999;
    transform: rotate(45deg);
    margin: 5px auto;
  }
  .tool a:hover .top-arrow {
    border-color: #fff;
  }
  
  #goTop {
    display: none;
  }